The intervention is based on the words of Christ in John3/8:
The wind bloweth where it listeth,
and thou hearest the sound thereof,
but canst not tell whence it cometh, and whither it goeth:
so is every one that is born of the Spirit.
Caused by a ventilation unit, negative pressure and excess pressure are changing within 5-10 minutes.
Thereby it will be a light physical experience if entering and leaving the church. Loose objects like curtains, hanging objects and also book pages will be easily moved by the airflow.